{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:N6YUCSTEY4B5JDSB6YW76OGSLW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e2dea18d8ef55d1881c8fef1f957054641c67141ee9f7542d192b047e3dae6d5","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-12-20T12:48:50Z","title_canon_sha256":"5ce718d942b971c82366d53904b6a82bd2ce1ae1c619ed71a09d075575a98d9f"},"schema_version":"1.0","source":{"id":"1312.5924","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.5924","created_at":"2026-05-18T02:51:08Z"},{"alias_kind":"arxiv_version","alias_value":"1312.5924v2","created_at":"2026-05-18T02:51:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.5924","created_at":"2026-05-18T02:51:08Z"},{"alias_kind":"pith_short_12","alias_value":"N6YUCSTEY4B5","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N6YUCSTEY4B5JDSB","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N6YUCSTE","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:8a79e983ebe2ee76df4d0a1ca6bbead256d6489428deafbb3ca64c6fd44882f7","target":"graph","created_at":"2026-05-18T02:51:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"There are 19 confirmed BH binaries in the Galaxy. 16 of them are X-ray transients hosting a ~5-15 Msun BH and a Roche-lobe overflowing low-mass companion. Companion masses are found mostly in 0.1-1 Msun mass range with peak at 0.6 Msun. The formation of these systems is believed to involve a common envelope phase, initiated by a BH progenitor, expected to be a massive star >20 Msun. It was realized that it may be very problematic for a low-mass companion to eject a massive envelope of the black hole progenitor. It invoked suggestions that an intermediate-mass companion ejects the envelope, and","authors_text":"Grzegorz Wiktorowicz, Krzysztof Belczynski, Thomas J. Maccarone","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-12-20T12:48:50Z","title":"Black Hole X-ray Transients: The Formation Puzzle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.5924","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ea329802c874b56c2b589029f8adc71b0a09b3504917fcac6afbf498f31ab9ca","target":"record","created_at":"2026-05-18T02:51:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e2dea18d8ef55d1881c8fef1f957054641c67141ee9f7542d192b047e3dae6d5","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-12-20T12:48:50Z","title_canon_sha256":"5ce718d942b971c82366d53904b6a82bd2ce1ae1c619ed71a09d075575a98d9f"},"schema_version":"1.0","source":{"id":"1312.5924","kind":"arxiv","version":2}},"canonical_sha256":"6fb1414a64c703d48e41f62dff38d25d85e69213dfb72e7304aa3ba120aa944d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6fb1414a64c703d48e41f62dff38d25d85e69213dfb72e7304aa3ba120aa944d","first_computed_at":"2026-05-18T02:51:08.218154Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:51:08.218154Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vcHCbfAdy6GpVbISDXQVce8kZ6hG30EimlvWqU9IL2XkYcTiS7ivx3VIi+xlvJ45cP3EZUuoWlnTsppPK1ebBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:51:08.218524Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.5924","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea329802c874b56c2b589029f8adc71b0a09b3504917fcac6afbf498f31ab9ca","sha256:8a79e983ebe2ee76df4d0a1ca6bbead256d6489428deafbb3ca64c6fd44882f7"],"state_sha256":"0b84c008efcc93dc301eed17207aa91b2df39496a0b638000de49e60e98f488d"}